He may have had only virtual sex to date, but the ACE (anonymity, convenience, escape) model of cybersexual addiction - as defined by Dr Kimberly Young, an acclaimed expert on internet addiction - shows that disinhibition, accelerated intimacy, and hypersexual online behaviour are a pretty accurate predictor of real-world transgressions.

And when a woman feels betrayed it can be incredibly irritating to have to listen to a therapist telling you that your boyfriend's cybersexual encounters are a symptom of underlying problems in your relationship, and that to maximise communication you need to suspend your feelings of betrayal and avoid judgmental language in favour of non-blaming statements such as "I feel neglected when you stay up all night reading porn-filled e-mails from strangers".